CN213569596U - Low-temperature evaporation treatment system for membrane-making wastewater - Google Patents
Low-temperature evaporation treatment system for membrane-making wastewater Download PDFInfo
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- CN213569596U CN213569596U CN202021482969.4U CN202021482969U CN213569596U CN 213569596 U CN213569596 U CN 213569596U CN 202021482969 U CN202021482969 U CN 202021482969U CN 213569596 U CN213569596 U CN 213569596U
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Abstract
The utility model discloses a system membrane waste water low temperature evaporation processing system. The system comprises: the low-temperature evaporator comprises a box body, a porous evaporation plate and an evaporation water tank, wherein a wastewater inlet is formed in the box body, a gas outlet and a gas inlet are formed in two side walls of the box body, and a water outlet and a concentrated solution outlet are formed in the evaporation water tank; the water circulation unit comprises a circulation pipeline and a circulation pump, wherein one end of the circulation pipeline is connected with the water outlet, and the other end of the circulation pipeline is connected with the wastewater inlet; an inlet heat exchange unit comprising: the air pipe, the fan, the heat exchanger, the condenser and the heat pump unit are respectively connected with the gas inlet and the gas outlet at two ends, the heating port of the heat pump unit is connected with the heat exchanger to form a loop, and the refrigerating port is connected with the condenser. The system can perform normal-pressure evaporation of wastewater at a low temperature of about 60 ℃, can realize secondary or even multiple times of low-temperature evaporation, and can effectively separate an organic solvent in membrane-making wastewater from a high-molecular membrane-making material.
Description
Technical Field
The utility model relates to an organic wastewater treatment system technical field especially relates to a system membrane waste water low temperature evaporation processing system.
Background
The production of the hollow fiber membrane adopts a thermal method or a wet spinning method, organic wastewater with high concentration (5-10%) COD can be generated in the process, the treatment of the wastewater is always a difficult problem in the industry, and the common process for treating the spinning wastewater at present comprises the following steps:
1. in the biochemical method, because the spinning wastewater contains high-concentration DMAC or DMF, the biochemical effect is poor, and the national third-level discharge standard is difficult to achieve.
2. The advanced oxidation method has high medicament cost and is difficult to reach the standard if the COD concentration is as high as 5 to 10 ten thousand ppm and the COD content is reduced by oxidation.
3. The common evaporation and rectification method not only contains organic solvent but also contains some high molecular film-making materials in spinning wastewater, and common evaporation and rectification can polymerize due to high temperature (more than 80 ℃) to further thicken gel, so that the solvent and the high molecular film-making materials can not be effectively separated, and the wastewater treatment effect can not be achieved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a system membrane waste water low temperature evaporation processing system to can't be with the problem of the effective separation of solvent and polymer membrane making material in the system membrane waste water among the solution prior art.
The above object of the present invention is achieved by the following technical solutions:
according to an aspect of the utility model, the utility model provides a pair of system membrane waste water low temperature evaporation processing system, include:
the low-temperature evaporator comprises a box body, a porous evaporation plate obliquely arranged in the box body and an evaporation water tank positioned at the lower part of the box body, wherein a wastewater inlet is formed in the top of the box body, a gas inlet and a gas outlet are respectively formed in two opposite side walls of the box body, and a water outlet and a concentrated solution outlet are formed in the evaporation water tank; wherein, the wastewater inlet and the gas outlet are positioned at one side of the porous evaporation plate, and the gas inlet is positioned at the other side of the porous evaporation plate;
the water circulation unit comprises a circulation pipeline and a circulation pump, one end of the water circulation pipeline is connected with the water outlet, the other end of the water circulation pipeline is connected with the wastewater inlet, and the circulation pump is connected in the circulation pipeline;
an inlet heat exchange unit comprising: the air pipe heat pump device comprises an air pipe, a fan, a heat exchanger, a condenser and a heat pump unit, wherein the two ends of the air pipe are respectively connected with a gas inlet and a gas outlet to form a gas circulation pipeline, the fan and the heat exchanger are connected on the air pipe on one side of the gas inlet, the condenser (comprising a condensate outlet and a solvent outlet) is connected on the air pipe on one side of the gas outlet, the heat pump unit comprises a heating port and a refrigerating port, the heating port is connected with the heat exchanger through a pipeline and forms a loop, and the refrigerating port is connected with the condenser through a pipeline.
Preferably, the heating port of the heat pump unit is communicated with the heat exchanger through a conveying pipeline and a return pipeline respectively, wherein a first buffer tank and a clean water circulating pump are arranged on the return pipeline.
Preferably, a second buffer tank is further arranged on a pipeline connecting a refrigeration port of the heat pump unit and the condenser.
Preferably, the method further comprises the following steps: the raw water tank is used for storing wastewater, the raw water tank is connected with a wastewater inlet through a pipeline, and a raw water pump is arranged on the pipeline and used for pumping the wastewater into the low-temperature evaporator.
Preferably, the heat exchanger is a plate-tube heat exchanger.
Preferably, the concentrate outlet is disposed at the bottom of the evaporation water tank.
Compared with the prior art, the utility model discloses membrane preparation waste water low temperature evaporation processing system adopts low temperature evaporator, hydrologic cycle unit and the heat transfer unit that admits air can realize that membrane preparation waste water carries out the ordinary pressure evaporation under low temperature (about 60 ℃) condition, and can realize secondary or even many times low temperature evaporation to separate organic solvent and polymer membrane making material in the membrane preparation waste water effectively. The system also has the advantages of simple and compact structure, convenient operation and use, safety, reliability, difficult blockage, easy cleaning, good evaporation effect, low energy consumption, zero emission and the like.
The system is particularly suitable for harmless treatment of organic wastewater generated in the production process of hollow fiber membranes, water treated by the low-temperature evaporator and the condenser can flow back to the spinning groove for reuse, and concentrated solution can enter the next procedure for advanced treatment.
Drawings
FIG. 1 is a schematic structural diagram of the membrane-making wastewater low-temperature evaporation treatment system of the utility model.
In FIG. 1, a 110 box body, a 120 porous evaporation plate, a 130 evaporation water tank, a 111 wastewater inlet, a 112 gas inlet, a 113 gas outlet, a 131 water outlet and a 132 concentrated solution outlet; 210 circulation pipes, 220 circulation pumps; 310 air pipes, 320 fans, 330 heat exchangers, 340 condensers, 341 condensed water outlets, 342 solvent outlets, 350 heat pump units, 351 heating ports, 3511 conveying pipelines, 3512 backflow pipelines, 3513 first buffer tanks, 3514 clear water circulating pumps and 352 refrigerating ports; 400 raw water tank, 410 raw water pump.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention:
fig. 1 schematically shows the structure of the membrane-making wastewater low-temperature evaporation treatment system of the utility model.
As shown in figure 1, the utility model provides a system membrane waste water low temperature evaporation processing system, include: the system comprises a low-temperature evaporator, a water circulation unit and an air inlet heat exchange unit. The utility model discloses a low temperature evaporator, hydrologic cycle unit and heat transfer unit admits air can realize that the membrane waste water carries out the ordinary pressure evaporation under low temperature (about 60 ℃) condition, and can realize secondary or even many times low temperature evaporation to separate the solvent in the membrane waste water with the polymer membrane material effectively.
The low temperature evaporator includes: the evaporation water tank includes a tank body 110, an evaporation water tank 130 disposed at a lower portion of the tank body 110, and a porous evaporation plate 120 obliquely disposed within the tank body 110, the porous evaporation plate 120 dividing the tank body 110 located at an upper portion of the evaporation water tank 130 into two regions. Wherein, a waste water inlet 111 is arranged at the top of the box body 110, and a gas inlet 112 and a gas outlet 113 are respectively arranged on two opposite side walls of the box body 110, wherein the waste water inlet 111 and the gas outlet 113 are located in the area of one side of the porous evaporation plate 120, and the gas inlet 112 is located in the area of the other side of the porous evaporation plate 120. A water outlet 131 is arranged on the side wall of the evaporation water tank 130, and further, the side wall can be located at the same side as the gas inlet 112, a concentrated solution outlet 132 is arranged at the bottom of the evaporation water tank 130, and the concentrated solution containing the polymer membrane making material after evaporation is discharged from the concentrated solution outlet 132 for advanced treatment.
The water circulation unit includes: a circulation line 210 and a circulation pump 220. Wherein, one end of the water circulation pipeline 210 is connected with the water outlet 131 at the evaporation water tank 130, and the other end is connected with the waste water inlet 111 at the top of the tank body 110. The circulation pump 220 is connected to the circulation pipe 210, and the wastewater is forcibly circulated by the circulation pump 220 after entering the tank 110 of the low-temperature evaporator, so as to perform secondary or multiple times of low-temperature normal-pressure evaporation. A valve may be provided on the circulation line 210.
The air inlet heat exchange unit comprises: air pipe 310, fan 320, heat exchanger 330, condenser 340 and heat pump unit 350.
The two ends of the air duct 310 are respectively connected with the gas inlet 112 and the gas outlet 113 to form a gas circulation pipeline, wherein the air enters from the gas inlet 112, the hot air is further blown in by the fan 320 and then subjected to heat exchange by the heat exchanger 330, and the saturated wet steam exits from the gas outlet 113. Valves may be provided on the air ducts 310 on the gas inlet 112 side and the gas outlet 113 side.
The fan 320 and the heat exchanger 330 are connected to the air pipe 310 on one side of the gas inlet 112, the heat exchanger 330 can be a plate-type pipe heat exchanger 330 and is positioned on the air pipe 310 between the fan 320 and the gas inlet 112, air blown out by the fan 320 exchanges heat through the heat exchanger 330 to form hot air, the hot air enters the box body 110 of the low-temperature evaporator, and is fully contacted with flowing liquid through the porous evaporation plate 120, so that the waste water is heated, rolled and turbulent, and is evaporated at the low temperature of about 60 ℃.
The condenser 340 is connected to the air pipe 310 on one side of the gas outlet 113 through a condenser fluid inlet, after saturated wet steam enters the condenser 340 for condensation, the gas returns to the heat exchanger 330 through the air pipe 310 for heat exchange and then enters the low-temperature evaporator again so as to be fully contacted with the wastewater in the box body 110, and the condensed water condensed by the condenser 340 can be discharged from a condensed water outlet 341 and can be reused; the final solvent can be discharged from a solvent outlet 342 at the lower part of the condenser, and can be recycled through rectification treatment, wherein a small amount of evaporated solids are harmless membrane-making high polymer materials and can be treated as common solid wastes.
The heat pump unit 350 includes: a heating port 351 and a cooling port 352. The heating port 351 is communicated with the heat exchanger 330 through a delivery pipe 3511 and a return pipe 3512, respectively, to form a loop, so as to provide a heat source for the heat exchanger 330. Further, a first buffer tank 3513 and a clean water circulating pump 3514 may be further disposed on the return pipe 3512. The cooling port 352 is connected to the condenser 340 through a pipe to provide a cooling source for the condenser 340. Further, a second buffer tank may be provided on the pipe connecting the refrigerant port 352 and the condenser 340. Further, valves may be provided in the pipes such as the delivery pipe 3511 and the return pipe 3512 as needed.
The utility model provides a membrane preparation waste water low temperature evaporation treatment system can also include: the raw water tank 400 is used for storing membrane-making wastewater, the raw water tank 400 is connected with the wastewater inlet 111 through a pipeline, and a raw water pump 410 is arranged on the pipeline and used for pumping the wastewater into the low-temperature evaporator. Wherein, the waste water inlet 111 communicating with the raw water tank 400 and the circulation pipe 210 may be the same or two different waste water inlets 111. In an alternative embodiment, a spraying device (not shown) may be further disposed at the waste water inlet 111 for spraying the waste water into the tank 110 so as to further contact the waste water with the hot air.
The treatment process of the membrane-making wastewater of the present application is described below with reference to fig. 1:
membrane-making wastewater stored in a raw water tank 400 enters a tank body 110 from a wastewater inlet 111 at the top of the tank body 110 through a raw water pump 410, air blown by a fan 320 exchanges heat with a heat exchanger 330 to generate hot air, the hot air enters the tank body 110 from a gas inlet 112 and fully contacts with the wastewater in the tank body 110 through a porous evaporation plate 120, so that the wastewater is heated, rolled and turbulent and evaporated at a low temperature of about 60 ℃ to form saturated wet steam, the saturated wet steam enters a condenser 340 from a gas outlet 113 to be condensed, the condensed gas exchanges heat with the heat exchanger 330 again through an air pipe 310 and then returns to the tank body 110 of the low-temperature evaporator to contact with the wastewater to be evaporated again, and condensed condensate water can be discharged from a condensate water outlet 341; the finally condensed solvent is discharged from the solvent outlet 342 at the lower part of the condenser 340, and the concentrated solution containing the polymer film-forming material in the low-temperature evaporator is discharged from the concentrated solution outlet 132 at the bottom of the evaporation water tank 130, and then is subjected to a deep treatment. In the whole process, the heat pump unit 350 is connected with the heat exchanger 330 to provide a heat source for the heat exchanger 330 so as to heat the system, and the heat pump unit 350 is connected with the condenser 340 to provide a cold source for the condenser 340 so as to refrigerate the system.
In addition, the first buffer tank 3513 arranged on the return pipe 3512 connecting the heat pump unit 350 and the heat exchanger 330 and the second buffer tank on the pipe connecting the heat pump unit 350 and the condenser 340 can play a good role in buffering.
The utility model discloses in this system can carry out the ordinary pressure evaporation under about 60 ℃ low temperature with the organic waste water that contains the DMAC solvent that the preparation hollow fiber membrane in-process produced or the organic waste water that produces in the milipore filter production process, and realized secondary low temperature evaporation many times even, separate organic solvent and polymer membrane making material in the membrane making waste water effectively. In addition, the system can be used for separating waste water containing two compatible media with large difference in boiling points.
Claims (6)
1. A low-temperature evaporation treatment system for membrane production wastewater is characterized by comprising:
the low-temperature evaporator comprises a box body, a porous evaporation plate obliquely arranged in the box body and an evaporation water tank positioned at the lower part of the box body, wherein a wastewater inlet is formed in the top of the box body, a gas inlet and a gas outlet are respectively formed in two opposite side walls of the box body, and a water outlet and a concentrated solution outlet are formed in the evaporation water tank; wherein, the wastewater inlet and the gas outlet are positioned at one side of the porous evaporation plate, and the gas inlet is positioned at the other side of the porous evaporation plate;
the water circulation unit comprises a circulation pipeline and a circulation pump, one end of the circulation pipeline is connected with the water outlet, the other end of the circulation pipeline is connected with the wastewater inlet, and the circulation pump is connected in the circulation pipeline;
an inlet heat exchange unit comprising: tuber pipe, fan, heat exchanger, condenser and heat pump set, the both ends of tuber pipe form the gas circulation pipeline with gas inlet and gas outlet connection respectively, fan and heat exchanger are connected on the tuber pipe of gas inlet one side, the condenser is connected on the tuber pipe of gas outlet one side, heat pump set is including making heat port and refrigeration port, it is connected and forms the return circuit with the heat exchanger through the pipeline to make heat the port, the refrigeration port passes through the pipeline and is connected with the condenser.
2. The system according to claim 1, characterized in that the heating port of the heat pump unit is communicated with the heat exchanger through a delivery pipe and a return pipe respectively, wherein a first buffer tank and a clean water circulating pump are arranged on the return pipe.
3. The system of claim 1, wherein a second buffer tank is further arranged on a pipeline connecting a refrigeration port of the heat pump unit and the condenser.
4. The system of claim 1, further comprising: the raw water tank is used for storing wastewater, the raw water tank is connected with a wastewater inlet through a pipeline, and a raw water pump is arranged on the pipeline and used for pumping the wastewater into the low-temperature evaporator.
5. The system of claim 1, wherein the heat exchanger is a plate and tube heat exchanger.
6. The system of claim 1, wherein the concentrate outlet is disposed at a bottom of the evaporation water tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021482969.4U CN213569596U (en) | 2020-07-24 | 2020-07-24 | Low-temperature evaporation treatment system for membrane-making wastewater |
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| CN202021482969.4U CN213569596U (en) | 2020-07-24 | 2020-07-24 | Low-temperature evaporation treatment system for membrane-making wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113292210A (en) * | 2021-07-27 | 2021-08-24 | 清大国华环境集团股份有限公司 | Ultramicro filter membrane manufacturing wastewater treatment process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113292210A (en) * | 2021-07-27 | 2021-08-24 | 清大国华环境集团股份有限公司 | Ultramicro filter membrane manufacturing wastewater treatment process |
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